@vh:6.67vh;
@vw:3.75vw;
.box{
    width: (68/@vw);
    height: (29/@vw);
    background-color: pink;
}
.box1{
    width: (68/@vh);
    height: (29/@vh);
    background-color: skyblue;
}
.box2{
    width: (68/@vh);
    height: (29/@vw);
    background-color: mediumspringgreen;
}
.box3{
    width: (68/@vw);
    height: (29/@vh);
    background-color: orchid;
}